28782227271 has 8 divisors (see below), whose sum is σ = 43858632064. Its totient is φ = 16446987000.

The previous prime is 28782227267. The next prime is 28782227291. The reversal of 28782227271 is 17272228782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28782227271 - 2² = 28782227267 is a prime.

It is a super-2 number, since 2×28782227271² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28782227271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28782227291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685291105 + ... + 685291146.

It is an arithmetic number, because the mean of its divisors is an integer number (5482329008).

Almost surely, 2^28782227271 is an apocalyptic number.

28782227271 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28782227271 is a deficient number, since it is larger than the sum of its proper divisors (15076404793).

28782227271 is a wasteful number, since it uses less digits than its factorization.

28782227271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370582261.

The product of its digits is 702464, while the sum is 48.

The spelling of 28782227271 in words is "twenty-eight billion, seven hundred eighty-two million, two hundred twenty-seven thousand, two hundred seventy-one".